XML 33 R32.htm IDEA: XBRL DOCUMENT v2.4.0.8
Marketable Securities and Fair Value Measurements (Details) (Fair Value, Measurements, Recurring [Member], USD $)
Sep. 30, 2014
Dec. 31, 2013
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value $ 107,023,423 $ 56,140,255
Liabilities, fair value 2,207,388 19,540,583
Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 76,173,138 36,517,147
Liabilities, fair value 0 0
Using Significant Other Unobservable Inputs (Level 2) [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 30,259,285 18,905,608
Liabilities, fair value 0 0
Using Significant Unobservable Inputs (Level 3) [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 591,000 717,500
Liabilities, fair value 2,207,388 19,540,583
Money market funds [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 67,174,763 26,852,560
Money market funds [Member] | Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 67,174,763 26,852,560
Money market funds [Member] | Using Significant Other Unobservable Inputs (Level 2) [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 0 0
Money market funds [Member] | Using Significant Unobservable Inputs (Level 3) [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 0 0
Mutual funds [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 29,457,773 18,099,904
Mutual funds [Member] | Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 0 0
Mutual funds [Member] | Using Significant Other Unobservable Inputs (Level 2) [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 29,457,773 18,099,904
Mutual funds [Member] | Using Significant Unobservable Inputs (Level 3) [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 0 0
Municipal bonds [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 801,512 805,704
Municipal bonds [Member] | Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 0 0
Municipal bonds [Member] | Using Significant Other Unobservable Inputs (Level 2) [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 801,512 805,704
Municipal bonds [Member] | Using Significant Unobservable Inputs (Level 3) [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 0 0
Investment in affiliated entity [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 8,998,375 9,664,587
Investment in affiliated entity [Member] | Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 8,998,375 9,664,587
Investment in affiliated entity [Member] | Using Significant Other Unobservable Inputs (Level 2) [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 0 0
Investment in affiliated entity [Member] | Using Significant Unobservable Inputs (Level 3) [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 0 0
Common stock warrants [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 591,000 717,500
Liabilities, fair value 2,207,388 19,540,583
Common stock warrants [Member] | Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 0 0
Liabilities, fair value 0 0
Common stock warrants [Member] | Using Significant Other Unobservable Inputs (Level 2) [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 0 0
Liabilities, fair value 0 0
Common stock warrants [Member] | Using Significant Unobservable Inputs (Level 3) [Member]
    
Financial assets and liabilities that are measured at fair value on recurring basis    
Assets, fair value 591,000 717,500
Liabilities, fair value $ 2,207,388 $ 19,540,583